J Mann1,2, F Al-Niaimi1, A Cooper2, V Ghura3. 1. Dermatological Surgery and Laser Unit, St John's Institute of Dermatology, London, U.K. 2. Friends Dermatology Centre, East Kent University Hospitals NHS Foundation Trust, Canterbury, U.K. 3. Mohs unit, Department of Dermatology, Salford Royal Foundation Trust, Manchester, U.K.